Results 41 to 50 of about 5,377 (132)

ALMA 0.5 kpc Resolution Spatially Resolved Investigations of Nuclear Dense Molecular Gas Properties in Nearby Ultraluminous Infrared Galaxies Based on HCN and HCO+ Three Transition Line Data

The Astrophysical Journal, 2023
We present the results of our ALMA ≲0.5 kpc resolution dense molecular line (HCN and HCO ^+ J = 2–1, J = 3–2, and J = 4–3) observations of 12 nearby (ultra)luminous infrared galaxies ([U]LIRGs). After matching beam sizes of all molecular line data to the
Masatoshi Imanishi, Shunsuke Baba, Kouichiro Nakanishi, Takuma Izumi   +3 more
doaj   +1 more source

Submillimeter Observations of the Ultraluminous BAL Quasar APM 08279+5255 [PDF]

, 1998
With an inferred bolometric luminosity of $5\times10^{15}{\rm \lsun}$, the recently identified z=3.87, broad absorption line quasar APM 08279+5255 is apparently the most luminous object currently known.
Clements D. L., Clements D. L., Eales S. A., Edward J. Totten, Efstathiou A., Geraint F. Lewis, Green S. M., Hildebrand R. H., Kneib J.-P., Michael J. Irwin, Rodrigo A. Ibata, Rowan-Robinson M., Rowan-Robinson M., Sandell G., Scott C. Chapman   +14 more
core   +2 more sources

Nature of Widely Separated Ultraluminous Infrared Galaxies

The Astrophysical Journal, 2001
In the complete sample of ultraluminous infrared galaxies (ULIRGs) compiled by Kim (1995) about 5% consists of widely separated galaxies which are presumably in the early phase of interaction. This fact is contrary to the conventional view that ULIRGs are in the final stages of the merger of two gas-rich disk galaxies.
Dinh-V-Trung, Lo, K. Y., Kim, D. -C., Gao, Yu, Gruendl, R. A.   +4 more
openaire   +2 more sources

Hard X-Ray to Radio Multiwavelength SED Analysis of Local U/LIRGs in the GOALS Sample with a Self-consistent AGN Model including a Polar-dust Component

The Astrophysical Journal Supplement Series, 2023
We conduct hard X-ray to radio multiwavelength spectral energy distribution (SED) decomposition for 57 local luminous and ultraluminous infrared galaxies observed with the Nuclear Spectroscopic Telescope Array and/or Swift/Burst Alert Telescope in the ...
Satoshi Yamada, Yoshihiro Ueda, Martín Herrera-Endoqui, Yoshiki Toba, Takamitsu Miyaji, Shoji Ogawa, Ryosuke Uematsu, Atsushi Tanimoto, Masatoshi Imanishi, Claudio Ricci   +9 more
doaj   +1 more source

Mid-infrared observations of the ultraluminous galaxies IRAS14348-1447, IRAS19254-7245, and IRAS23128-5919

, 2002
We present a study of the three ultraluminous infrared galaxies IRAS14348-1447, IRAS19254-7245, and IRAS23128-5919, based on mid-infrared (MIR) spectro-imaging (5-18microns) observations performed with ISOCAM.
Cesarsky, C. J., Charmandaris, V., Floc'h, E. Le, Gallais, P., Laurent, O., Madden, S., Mirabel, I. F., Sauvage, M., Vigroux, L.   +8 more
core   +1 more source

Hidden Quasars in Ultraluminous Infrared Galaxies [PDF]

Symposium - International Astronomical Union, 1999
Many ultraluminous infrared galaxies (ULIRGs) are powered by quasars hidden in the center, but many are also powered by starbursts. A simply diagnostic diagram is proposed that can identify obscured quasars in ULIRGs by their high-ionization emission lines ([O III]λ5007/Hβ ≳ 5), and “warm” IR color (f25/f60≳ 0.25).
Brotherton, M. S., Stanford, S. A., Tran, H., van Breugel, W.   +3 more
openaire   +2 more sources

J0107a: A Barred Spiral Dusty Star-forming Galaxy at z = 2.467

The Astrophysical Journal Letters, 2023
Dusty star-forming galaxies (DSFGs) are among the most massive and active star-forming galaxies during the cosmic noon. Theoretical studies have proposed various formation mechanisms of DSFGs, including major merger-driven starbursts and secular star ...
Shuo Huang, Ryohei Kawabe, Kotaro Kohno, Toshiki Saito, Shoichiro Mizukoshi, Daisuke Iono, Tomonari Michiyama, Yoichi Tamura, Christopher C. Hayward, Hideki Umehata   +9 more
doaj   +1 more source

Probing for evolutionary links between local ULIRGs and QSOs from NIR spectroscopy

, 2005
We present a study of the dynamical evolution of Ultraluminous Infrared Galaxies (ULIRGs), merging galaxies of infrared luminosity >10^12 L_sun. During our Very Large Telescope large program, we have obtained ISAAC near-infrared, high-resolution spectra ...
Baker, A. J., Dasyra, K. M., Davies, R. I., Genzel, R., Lutz, D., Naab, T., Sanders, D. B., Tacconi, L. J., Veilleux, S.   +8 more
core   +1 more source

Seeking for the Leading Actor on the Cosmic Stage: Galaxies versus Supermassive Black Holes

, 2012
Advances in Astronomy, Volume 2012, Issue 1, 2012.
Angela Bongiorno, Francesco Shankar, Francesca Civano, Isabelle Gavignaud, Antonis Georgakakis   +4 more
wiley   +1 more source

CO Survey of High-z Radio Galaxies, Revisited with the Atacama Large Millimeter/submillimeter Array: Jet–Cloud Alignments and Synchrotron Brightening by Molecular Gas in the Circumgalactic Environment

The Astrophysical Journal, 2023
Powerful radio sources associated with supermassive black holes are among the most luminous objects in the universe, and are frequently recognized both as cosmological probes and active constituents in the evolution of galaxies.
Bjorn H. C. Emonts, Matthew D. Lehnert, Sophie Lebowitz, George K. Miley, Montserrat Villar-Martín, Ray Norris, Carlos De Breuck, Chris Carilli, Ilana Feain   +8 more
doaj   +1 more source